Sometimes the chunk rendering glitches out when im in specific places looking on specific angles (usually 60 to 90 on f3 screen). i dont know why it happens but i replicated it on creative and discover that solid blocks on specific coordinates directly interfere on it.

How to replicate the visual glitch:
1- Put your FOV at the maximum possible, it doesnt matter if you do this after or before joining the world, its just to help visualizing it.
2- Create a new world with the seed -1414384297813050096
3- Go to the coordinates [-1009 / 98 / -1] and stand there.
4- While facing north, look down.
At this point you should see the glitch. 

Messing around with it, i end up discovering that:
 If you have solid blocks in one or more of the coordinates: [(1008, 1007, 1006, 1005) / 95 / -1] ,the visual glitch will happen, but if you remove them, it wont. 
 It still happens when you walk around in the same chunk, and in [-1009 / 99 / -8] it gets worse, but oddly this worseness only happen if there is a solid block present at [-1008 / 95 / -1].

I ve seen similar visual glitches before in other maps i played, so since i could replicate it im posting here. hope it is of help.

Video demonstrating the glitch: https://www.youtube.com/watch?v=_heW_R8fj84